SJ700
2
Inverter
Oper
ati
ons
and Monitor
ing
4–49
Use the parameters listed in the table below to define Instantaneous Power Failure and
Under-voltage Signal operation.
In the following examples, t
0
= instantaneous power failure time, t
1
= allowable under-voltage /
power failure time (B002), and t
2
= retry wait time (B003).
Code
Function
Data or Range
Description
B001
Selection of
automatic restart
mode
00
Alarm output after trip, automatic
restart disabled
01
Restart at 0 Hz
02
Retry with frequency matching to
present motor speed
03
Retry with frequency matching
followed by deceleration to stop— then
trip alarm
B002
Allowable under-
voltage power
failure time
0.3 to 1.0 sec.
The amount of time a power input
under-voltage can occur without
tripping the power failure alarm. If
under-voltage exists longer than this
time, the inverter trips, even if the restart
mode is selected. If it exists less than
this time retry will be attempted.
B003
Retry wait time
before motor
restart
0.3 to 100 sec.
Time delay after a trip condition goes
away before the inverter restarts the
motor
B004
Instantaneous
power failure /
voltage trip alarm
enable
00
Disable
01
Enable
02
Disable during stop and ramp to stop
B005
Number of restarts
on power failure /
under-voltage trip
events
00
Restart up to 16 times on instantaneous
power failure or under-voltage
01
Always restart on instantaneous power
failure or an under-voltage condition
B007
Restart frequency
threshold
0.00 to 400.0 Hz;
model -4000HFx2
is 0.00 to 120.0 Hz
When frequency of the motor is less
than this value, the inverter will restart
at 0 Hz
Power supply
Inverter output
Motor
frequency
After waiting for t
2
seconds when t
0
< t
1
; restart
Example 1: Power failure within allowed limits; resume
Example 2: Power failure longer than limits; trip
t
0
t
1
t
2
Power supply
Inverter output
Motor
frequency
t
0
t
1
Inverter trips when t
0
> t
1
Free-run
Free-run
t
t